A couple of pieces of advice I was given by smart writers years ago have been helpful. Once when I was talking about phoning Lisa Westberg Peters, she said, "Before noon is too soon." For Lisa the morning was writing time and she put off her contact with the rest of the world until the afternoon. I've tried to follow that and frequently don't check email until after noon. It's a gentle reminder that the first thing I need to do each day is write, and that there's plenty of time later to do the other things.
The other piece of wisdom came from the poet Naomi Shihab Nye. She told me once that one word that she does not use for herself is busy. I was struck by how freeing it could be to remove this word from one's vocabulary and how it clarifies that what we do is a reflection of our intent. I haven't used the word busy in years, and it helps me to enjoy what I do more.
When my mother died, I was struck by how little we know about the time we have. I'm still in that mourning period, but I am becoming clearer about some of what I want to do and don't want to do with the time that I have.